/**
 * Copyright (c) 2009 Jim Hurne
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
package org.tzconverter.patterneditor;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import org.tzconverter.AbstractManager;
import org.tzconverter.menu.MenuView;

/**
 * Manager for the PatternEditor triad, which allows the user to change
 * the date/time pattern used by the application.
 * 
 * 
 * @since Jun 2, 2009
 */

public class PatternEditorManager extends AbstractManager
{
  private PatternEditorModel model;
  private PatternEditorView view;
  /**
   * @param model
   * @param view
   */
  public PatternEditorManager(PatternEditorModel model, PatternEditorView view, MenuView menuView)
  {
    super(menuView);
    this.model = model;
    this.view = view;
    
    registerListeners();
  }
  
  public void afterConstructed()
  {
    // Initialize the view by loading the default
    // pattern from the application preferences
    whenLoadClicked();    
  }
  
  private void whenPatternChanged(String pattern)
  {
    if(model.isValidPattern(pattern))
    {
      view.clearError();
      view.setApplyButtonEnabled(true);
    }
    else
    {
      view.showError("Invalid date/time pattern");
      view.setApplyButtonEnabled(false);
    }
  }  
  
  private void whenApplyButtonClicked()
  {
    model.setPattern(view.getPattern());
  }
  
  @Override
  protected void whenLoadClicked()
  {
    view.setPattern(model.loadPattern());
  }
  
  

  @Override
  protected void whenLoadDefaultsClicked()
  {
    view.setPattern(model.loadDefaultPattern());
  }

  @Override
  protected void whenSaveClicked()
  {
    model.savePattern();
  }

  private void registerListeners() {
    view.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent event)
      {
        whenApplyButtonClicked();
      }
      
    });
    
    view.addPropertyChangeListener(new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent event)
      {
        if(PatternEditorView.PROP_PATTERN.equals(event.getPropertyName()))
        {
          whenPatternChanged((String) event.getNewValue());
        }
      }
    });
  }  

}
